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Publication numberUS4842649 A
Publication typeGrant
Application numberUS 07/103,755
Publication dateJun 27, 1989
Filing dateOct 2, 1987
Priority dateOct 2, 1987
Fee statusPaid
Also published asCA1327373C, DE3873324D1, DE3873324T2, EP0346350A1, EP0346350A4, EP0346350B1, WO1989002878A1
Publication number07103755, 103755, US 4842649 A, US 4842649A, US-A-4842649, US4842649 A, US4842649A
InventorsRichard F. Heitzmann, Billy B. Gravitt, James L. Sawyer
Original AssigneePyrament, Inc.
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Cement composition curable at low temperatures
US 4842649 A
Abstract
A blended hydraulic cement composition, curable at low temperatures, including temperatures below the freezing point of water, is composed of portland cement, slag, pozzolans including metakaolin, and admixtures including potassium carbonate and water reducing compositions. The cement is particularly useful in producing concrete compositions which achieve high strength in a brief period of time, and continue curing at ambient temperatures, and temperatures below the freezing point of water.
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Claims(16)
We claim:
1. A blended hydraulic cement composition, capable of curing at temperatures below freezing, consisting essentially of:
From 50 parts to about 80 parts portland cement
From 13 parts to about 35 parts fly ash
From 0 parts to about 10 parts metakaolin
From 0 parts to about 6 parts slag
From 0 parts to 4 parts admixture, wherein said admixture is a set regulating additive,
From 1 part to about 5 parts potassium carbonate, wherein the parts of potassium carbonate plus one-half of the parts of metakaolin is equal to at least 2.
2. The composition of claim 1 wherein the admixture is citric acid in an amount of from 0.5 to 1.5 parts, by weight.
3. The composition of claim 1 wherein the amount of the admixture is from about 0.15 to 0.40 part, by weight.
4. The composition of claim 1 wherein the amount of portland cement is from 55 to 60 parts, by weight.
5. The composition of claim 1 wherein the amount of fly ash is from about 20 to 30 parts, by weight.
6. The composition of claim 1 wherein the amount of metakaolin is from about 4 to 6 parts, by weight.
7. The composition of claim 1 wherein the amount of slag is from about 4 to 5 parts, by weight.
8. The composition of claim 1 wherein up to one-third of the potassium carbonate is replaced by an alkali metal hydroxide.
9. A blended hydraulic cement composition, capable of curing at temperatures below freezing, consisting essentially of:
From 50 parts to about 80 parts portland cement
From 13 parts to about 35 parts fly ash
From 0 parts to about 10 parts metakaolin
From 0 parts to about 6 parts slag
From 0 parts to 4 parts admixture, wherein said admixture is a set regulating additive,
From 1 part to about 5 parts sodium carbonate, wherein the parts of sodium carbonate plus one-half of the parts of metakaolin is equal to at least 2.
10. The composition of claim 9 wherein the admixture is citric acid in an amount of from 0.5 to 1.5 parts, by weight.
11. The composition of claim 9 wherein the amount of admixture, is from about 0.15 to 0.40 parts, by weight.
12. The composition of claim 9 wherein the amount of portland cement is from 55 to 60 parts, by weight.
13. The composition of claim 9 wherein the amount of fly ash is from about 20 to 30 parts, by weight.
14. The composition of claim 9 wherein the amount of metakaolin is from about 4 to 6 parts, by weight.
15. The composition of claim 9 wherein the amount of slag is from about 4 to 5 parts, by weight.
16. The composition of claim 9 wherein up to one-third of the sodium carbonate is replaced by an alkali metal hydroxide.
Description
BACKGROUND OF THE INVENTION

Blended hydraulic cements are well known for their use of materials, such as fly ash and other pozzolans, that can result in durable concrete and good ultimate strengths. Unfortunately, these blended cements of the prior art do not generally achieve usable strengths for a substantial period of time and, thus, construction schedules are delayed. In addition, most of these compositions are portland cement compositions where the recommended cure is at 60 to 80 F., and absolutely no cure is obtained below 35 F.

While the ability to construct structures using cement, such as roads, air fields, and the like, at low temperatures has long been sought, and is desirable, for structures of this type, repair at temperatures below 35, and substantially below that, is absolutely essential in modern society. Prior cement compositions have not permitted this, and, thus, the search has continued. In addition to the ability to cure at these low temperatures, the rapid attainment of usable strength is essential.

BRIEF DESCRIPTION OF THE INVENTION

In accordance with the present invention, a blended hydraulic cement has been developed that provides high early strengths, high ultimate strengths, durability and continues to gain strength at temperatures below freezing.

This cement can be utilized for rapid concrete construction or repair for hot weather or cold weather concreting as well as concreting under less extreme conditions thus allowing all weather concreting. This cement can be used for precast and prestressed concrete with or without heat curing.

The composition of the present invention includes the following components:

From 50 parts to about 80 parts portland cement

From 13 parts to about 35 parts fly ash

From 0 parts to about 10 parts metakaolin

From 0 parts to about 6 parts slag

From 0 parts to 4 parts admixture

From 1 parts to about 5 parts potassium carbonate

When the cement of the present invention is used in concrete or mortar, the resulting hardened material has sufficient strength so that it can be put in service a few hours after being placed. This strength can be obtained without heat curing and continues to increase even when the hardened material is below the freezing point of water.

While it is indicated that the amount of metakaolin in the composition can vary from 0 to 10 parts, and that the amount of potassium carbonate can be between 1 and 5 parts, in order to achieve the continuing cure at temperatures below the freezing point of water, there must be at least 4 parts of metakaolin present, or 2 parts of potassium carbonate, or a combination of the two to provide a total of 2 parts based upon the formula:

Parts=parts potassium carbonate+1/2(parts metakaolin)

While the cured concrete formed in accordance with the present composition is primarily intended for rapid repair or reconstruction, it is not so limited, and can be effectively used for new construction, as well. The composition can obtain a compressive strength within a month of 12,000 psi, or even more. Such compressive strengths are above the compressive strengths readily attainable with present portland cement compositions.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

The blended hydraulic cement of the present invention has, as previously indicated, the following essential components:

From 50 parts to about 80 parts portland cement

From 13 parts to about 35 parts fly ash

From 0 parts to about 10 parts metakaolin

From 0 parts to about 6 parts slag

From 0 parts to 4 parts admixture

From 1 parts to about 5 parts potassium carbonate

The portland cement which is employed in the composition can be any of the types set forth in ASTM C 150-85A, or any desired blend of these compositions. Preferably, the amount of portland cement employed is in the range of from 55 to 60 parts, by weight.

The amount of fly ash is, to some extent, dependent upon the amount of portland cement employed in the composition. Preferably, the amount of fly ash is between 20 and 30 parts, by weight. The total of portland cement, fly ash, and slag, is also interdependent, and, in general, the total of these three items should be between 83 and 91 parts, by weight. Further, as the amount of fly ash is decreased, it can be compensated for, in part, by increasing use of metakaolin.

The type of fly ash to be employed is that defined as either Class F or Class C in ASTM designation C618-85. The Class C fly ash is preferred, because of the increased calcium oxide content; however, the Class F fly ash can be used with higher amounts of portland cement and/or slag. Either type of fly ash imparts sulfate resistance to the blended cement.

The metakaolin (Al2 O3.SiO2) is obtained by dehydroxylating kaolinite by heating at temperatures above 50 C. until the characteristic crystal structure is destroyed. The optimum temperature range is 600 C. to 800 C. The metakaolin essentially meets the classification requirements for a Class N calcined natural pozzolan as described in ASTM C618-85. The preferred amount of metakaolin to be employed is between 4 and 6 parts, by weight, though lower amounts can be employed. However, as indicated above, the inclusion of metakaolin in the formulation is preferable where the utilization of the composition at temperatures below the freezing point of water is contemplated. When little, or no, metakaolin is present, there is less durability in the finished product in successive freeze/thaw cycles. When metakaolin in the range of 6 to 10% is employed, more water is required for curing the cement, and the cost of the composition is increased beyond a desirable amount.

The slag which is employed is a finely ground, granulated blast furnace slag as set forth for blended hydraulic cements in ASTM standard C595-86. Preferably, the amount of slag to be employed is between 4 and 5 parts, by weight. If desired, as indicated by the overall formulation, the slag component of the composition can be omitted completely. However, it does supply some glassy silicate components, as well as calcium compounds. Further, the use of slag does provide some sulfate resistance, but that resistance is also provided by fly ash.

While a variety of materials could be employed as the admixtures to be used in this composition, the preferred materials are citric acid and a material sold as Cormix 2000. When these are employed, the citric acid is preferably used in amounts of up to 3 parts and the Cormix in in amounts of up to 1 part, preferably 0.5 to 1.5 parts by weight citric acid and 0.15 to 0.40 part by weight Cormix 2000.

The citric acid can be used in any of its available grades, including fine crystal, liquid, or powder. Additionally, salts of citric acid can be used in place of the citric acid, itself. The material is a known retarder for aluminate phases in portland cement, calcium fluoroaluminate, and calcium aluminate cements. In the composition of the present invention, it functions as a retarder for the hydration reactions and, at the same time, reduces the water requirement and shortens mixing time. Because of the relatively high cost of the material, the minimum required should be used. However its total elimination results in less workability and lower strengths. While, as indicated, salts of the citric acid, such as potassium and sodium citrate can be employed, the use of too great an amount of these materials results in a composition which will not harden. The citric acid also reduces the mixing time required to achieve fluidity.

The reason for desiring less water is that greater strength in the final concrete is obtained at a given plasticity. Further, use of less water provides improved permeability and strength in the final composition. The citric acid can be employed in conjunction with other retarders and, under those circumstances, the amount of citric acid would be less in the overall composition.

The Cormix 2000 is the sodium salt of a copolymer of an unsaturated carboxylic acid and the hydroxyalkyl ester of that acid. The material meets the requirements of ASTM C494-86, as a type G admixture, one which is water-reducing, high range, and retarding. As with the citric acid, the Cormix 2000 reduces the amount of water required to give a workable mix, therefore increasing the strength and cold weather performance of the final concrete. While the Cormix has been found to be effective, it could be replaced with many other admixtures which are also high range, water reducers. However, there is a cost effectiveness factor which must be considered.

An essential component of the cement composition of the present invention is potassium carbonate. Preferably, it is used as a fine powder and all, or part of it, can be replaced with sodium carbonate. Additionally, kiln dust could be used in place of the potassium carbonate, but it provides problems in that it also contains potassium sulfate and calcium carbonate. While the use of potassium carbonate as an accelerator has previously been disclosed, it has not been used with the components of the present invention to provide the particularly surprising properties accomplished. While it is possible to substitute alkali hydroxides for the potassium carbonate, the composition does not perform as well in low temperature curing. Up to one-third of the potassium carbonate can be replaced with alkali metal hydroxides. When using alkali hydroxides, there are also greater storage problems.

The potassium carbonate, which is preferably used in an amount of from 2 to 4 parts, by weight, accelerates the pozzolanic reactions between hydroxides and siliceous or siliceous-aluminous materials. It is particularly effective for this purpose, both at ambient temperatures and at temperatures below the freezing point of water. When employed in higher amounts, higher early strengths are obtained, but there is less working time available for placement of the concrete.

The order of mixing the various materials which make up the composition of the present invention is immaterial. All of the components can be interground or interblended, and used as a complete cement formulation. If desired, some or all of the pozzolan materials can be added at the concrete mixer, and the functional additions added in a water solution at the concrete mixer.

Employing the formulations of the present invention, as previously indicated, contrary to the prior art, cures can be effected at temperatures well below the freezing point of water and, in fact, cure can be accomplished at temperatures as low as -16 F. Even at these low temperatures, substantial strengths are obtained, so that repair work is possible, particularly on roads and airports, even during winter months, something which cannot be accomplished with portland cement.

The following are given as examples of the formulations of the cement of the present invention. They should be considered only as illustrative and not as limiting, in any way, the full scope of the invention as covered in the appended claims of the invention. All parts are by weight.

Examples EXAMPLE 1

A binder was prepared consisting of:

58.20 parts portland cement

28.77 parts Class C fly ash

4.41 parts metakaolin

4.82 parts slag

1.18 parts citric acid

0.35 part Cormix 2000

2.27 parts potassium carbonate

EXAMPLE 2

A concrete was prepared employing the binder of Example 1 and other necessary materials as indicated below:

747.4 parts of Binder of Example 1

1148 parts sand

1722 parts gravel

175 parts water

The various materials were mixed in a concrete mixer. The resulting concrete had a slump of 0 inches and remained workable for 105 minutes. The concrete was cast in molds and cured at ambient temperatures (73 F.). This concrete had compressive strengths of 4,000 psi at 4 hours, 5,800 psi at 1 day, 10,000 psi at 7 days, and 12,000 psi at 28 days.

EXAMPLE 3

This was the same as Example 2, except that 185 parts of water were used. This concrete had the following properties: 21/2 inch slump, 90 minutes workability, compressive strengths of 3,200 psi at 4 hours, 5,100 psi at 1 day, 9,600 psi at 7 days, and 12,500 psi at 28 days.

EXAMPLE 4

The same concrete as in Example 3 when mixed and cast in molds at ambient temperatures (73 F.), and then cooled to 62 F., when brought to ambient temperature, just prior to testing had compressive strengths of 2,200 psi at 4 hours, 3,400 psi at 1 day, and 4,100 psi at 7 days. In this, and subsequent examples when the material was first cooled to 62 F., and then brought to ambient temperature, sufficient were made for each of the tests. Each sample was allowed to warm to ambient temperature for its test, only.

EXAMPLE 5

This was the same as Example 2, except that 195 parts of water were used. This concrete had the following properties: 6 inch slump, 80 minutes workability, compressive strengths of 2,700 psi at 4 hours, 4,500 psi at 1 day, 9,000 psi at 7 days and 10,800 psi at 28 days.

EXAMPLE 6

A binder was prepared similar to Example 1, except that 2.54 parts of potassium carbonate were used instead of 2.27 parts of potassium carbonate.

EXAMPLE 7

A concrete was prepared employing the binder of Example 6 and other necessary materials as indicated below:

749.4 parts of Binder of Example 6

1148 parts sand

1722 parts gravel

175 parts water

This concrete had the following properties: 0 inch slump, 75 minutes workability, compressive strengths of 4,000 psi at 4 hours, 6,000 psi at 1 day, 10,000 psi at 7 days, and 12,000 psi at 28 days.

EXAMPLE 8 This was the same as Example 7, except that 185 parts of water were used. This concrete had the following properties: 1/4 inch slump, 75 minutes workability, compressive strengths of 3,500 psi at 4 hours, 5,600 psi at 1 day, 9,800 psi at 7 days, and 11,900 psi at 28 days. EXAMPLE 9

The same concrete as in Example 8 when mixed and cast in molds at ambient temperatures (73 F.), and immediately cooled to 62 F., and warmed to ambient just prior to testing had compressive strengths of 2,900 psi at 4 hours, 3,500 psi at 1 day, and 4,200 psi at 7 days.

EXAMPLE 10

This was the same as Example 7, except that 195 parts of water were used. This concrete had the following properties: 6 inch slump, 90 minutes workability, compressive strengths of 2,800 psi at 4 hours, 4,600 psi at 1 day, 9,200 psi at 7 days, and 11,100 psi at 28 days.

EXAMPLE 11

A binder was prepared similar to Example 1, except that 2.79 parts of potassium carbonate were used instead of 2.27 parts of potassium carbonate.

EXAMPLE 12

A concrete was prepared employing the binder of Example 11 and other necessary materials as indicated below:

751.4 parts of Binder of Example 11

1148 parts sand

1722 parts gravel

175 parts water

This concrete had the following properties: 0 inch slump, 65 minutes workability, compressive strengths of 4,200 psi at 4 hours, 6,200 psi at 1 day, 10,600 psi at 7 days, and 12,000 psi at 28 days.

EXAMPLE 13

This was the same as Example 12, except that 185 parts of water used. This concrete had the following properties: 11/2 inch slump, 60 minutes workability, compressive strengths of 3,700 psi at 4 hours, 5,900 psi at 1 day, 9,800 psi at 7 days, and 11,500 psi at 28 days.

EXAMPLE 14

The same concrete as in Example 13, when mixed and cast in molds at ambient temperatures (73 F.) and immediately cooled to 62 F., and warmed to ambient just prior to testing had compressive strengths of 3,200 psi at 4 hours, 3,600 psi at 1 day, and 4,300 psi at 7 days.

EXAMPLE 15

This was the same as Example 12, except that 195 parts of water were used. This concrete had the following properties: 4 inch slump, 80 minutes workability, compressive strengths of 2,800 psi at 4 hours, 4,800 psi at 1 day, 9,500 psi at 7 days, and 11,200 psi at 28 days.

EXAMPLE 16

A binder was prepared similar to Example 1, except that 3.05 parts of potassium carbonate were used instead of 2.27 parts of potassium carbonate.

EXAMPLE 17

A concrete was prepared employing the binder of Example 16 and other necessary materials as indicated below:

753.4 parts Binder of Example 16

1148 parts sand

1722 parts gravel

175 parts water

This concrete had the following properties: 0 inch slump, 35 minutes workability, compressive strengths of 4,200 psi at 4 hours, 6,500 psi at 1 day, 10,700 psi at 7 days, and 12,400 psi at 28 days.

EXAMPLE 18

This was the same as Example 17, except that 185 parts of water were used. This concrete had the following properties: 3/4 inch slump, 45 minutes workability, compressive strengths of 3,900 psi at 4 hours, 6,200 psi at 1 day, 9,800 psi at 7 days, and 12,200 psi at 28 days.

EXAMPLE 19

The same concrete as in Example 18, when mixed and cast in molds at ambient temperatures (73 F.) and immediately cooled to 62 F. and warmed to ambient temperature just prior to testing, had compressive strengths of 3,400 psi at 4 hours, 3,600 psi at 1 day, and 4,300 psi at 7 days.

EXAMPLE 20

This was the same as Example 17, except that 195 parts of water were used. This concrete had the following properties: 21/2 inch slump, 55 minutes workability, compressive strengths of 3,000 psi at 4 hours, 5,600 psi at 1 day, 9,800 psi at 7 days, and 12,000 psi at 28 days.

EXAMPLE 21

A binder was prepared consisting of:

58.16 parts portland cement

29.21 parts Class C fly ash

4.54 parts metakaolin

4.80 parts slag

0.93 part citric acid

0.17 part Cormix 2000

0.19 part borax

2.00 parts potassium carbonate

EXAMPLE 22

A concrete was prepared employing the binder of Example 21 and other necessary materials as indicated below:

749.7 parts Binder of Example 21

2870 parts sand and gravel

200 parts water

The various materials were mixed in a concrete mixer. The resulting concrete remained workable for 80 minutes. The concrete was mixed, cast in molds and cured at ambient temperatures 73 F.). This concrete had compressive strengths of 3,100 psi at 4 hours, 5,200 psi at 1 day, and 10,600 psi at 3 days.

EXAMPLE 23

A binder was prepared consisting of:

57.28 parts portland cement

29.31 parts Class C fly ash

4.95 parts metakaolin

5.35 parts slag

0.67 part citric acid

0.20 part Cormix 2000

0.23 part borax

2.01 parts potassium carbonate

EXAMPLE 24

A concrete was prepared employing the binder of Example 23 and other necessary materials as indicated below:

747.2 parts Binder of Example 23

2870 parts sand and gravel

200 parts water

The various materials were mixed in a concrete mixer. The resulting concrete remained workable for 115 minutes. The concrete was mixed, cast in molds, and cured at ambient temperatures (73 F.). This concrete had compressive strengths of 2,700 psi at 4 hours, 5,100 psi at 1 day, and 10,200 psi at 3 days.

EXAMPLE 25

A binder was prepared consisting of:

58.05 parts portland cement

24.02 parts Class C fly ash

4.40 parts metakaolin

4.80 parts slag

1.17 parts citric acid

0.35 part Cormix 2000

2.54 parts potassium carbonate

4.67 parts kiln dust

EXAMPLE 26

A concrete was prepared employing the binder of Example 25 and other necessary materials as indicated below:

749.4 parts Binder of Example 25

1148 parts sand

1722 parts gravel

180 parts water

The various materials were mixed in a concrete mixer. The concrete was mixed, cast in molds and cured at ambient temperatures (73 F.). This concrete had compressive strengths of 2,300 psi at 2 hours, 3,300 psi at 3 hours, and 3,800 psi at 4 hours.

EXAMPLE 27

A binder was prepared consisting of:

56.52 parts portland cement

29.06 parts Class C fly ash

4.93 parts metakaolin

5.33 parts slag

1.20 parts citric acid

0.20 part Cormix 2000

0.23 part borax

0.93 part potassium hydroxide

1.60 parts potassium carbonate

EXAMPLE 28

A concrete was prepared using the binder of Example 27 and other necessary materials as indicated below:

750.2 parts Binder of Example 27

2870 parts sand and gravel

183 parts water

The various materials were mixed in a concrete mixer. The resulting concrete remained workable for 70 minutes. The concrete was mixed, cast in molds, and cured at ambient temperatures (73 F.). This concrete had compressive strengths of 4,000 psi at 4 hours, and 5,600 psi at 1 day.

EXAMPLE 29

A binder was prepared similar to Example 1, except that a Class F fly ash was used instead of Class C fly ash, and 3.34 parts of potassium carbonate were used instead of 2.27 parts of potassium carbonate.

EXAMPLE 30

A concrete was prepared employing the binder of Example 29 and other necessary materials as indicated below:

755.4 parts of Binder of Example 29

2870 parts sand and gravel

188 parts water

The various materials were mixed in a concrete mixer. The resulting concrete had a slump of 1 inch. The concrete was cast in molds and cured at ambient temperatures (73 F.). This concrete had compressive strengths of 2,300 psi at 4 hours, 4,500 psi at 1 day, 9,600 psi at 7 days, and 12,000 psi at 28 days.

EXAMPLE 31

The same concrete as in Example 30 when mixed and cast in molds at ambient temperatures (73 F.) and immediately cooled at 62 F. and then warmed to ambient temperature just prior to testing, had compressive strengths of 1,700 psi at 4 hours, 2,600 psi at 1 day, 4,000 psi at 7 days, and 5,800 psi at 28 days.

EXAMPLE 32

A binder was prepared consisting of:

58.54 parts portland cement

28.52 parts Class C fly ash

4.46 parts metakaolin

4.80 parts slag

0.83 part citric acid

0.16 part Cormix 2000

0.21 part WRDA 79

2.48 parts potassium carbonate

WRDA 79 is a modified lignosulfate, with catalyst, meeting the requirements of ASTM C494-86 as a Type A admixture and Type D admixture.

EXAMPLE 33

A concrete was prepared employing the binder of Example 32 and other necessary materials as indicated below:

605 parts Binder of Example 32

1300 parts sand

1817 parts gravel

155 parts water

The various materials were mixed in a concrete mixer. The concrete was mixed, cast in molds and cured at ambient temperature (73 F.). This concrete had compressive strengths of 2,200 psi at 4 hours, 5,300 psi at 1 day, 11,400 psi at 7 days, and 12,000 psi at 28 days.

EXAMPLE 34

The same concrete as in Example 33 when mixed and cast in molds at ambient temperatures (73 F.) and immediately cooled to 62 F. and warmed to ambient temperature just prior to testing had compressive strengths of 900 psi at 4 hours, 3,300 psi at 1 day, 3,900 psi at 7 days, and 6,300 psi at 28 days.

EXAMPLE 35

A mortar was prepared employing the binder of Example 11 and other necessary materials as indicated below:

752 parts of Binder of Example 11

1200 parts sand

176 parts water

The various materials were mixed in a mortar mixer. The mortar was mixed and cast in molds at ambient temperature (73 F.). One third of the specimens were stored in ambient air (73 F.) and this mortar had compressive strengths of 13,000 psi at 7 days, 14,700 psi at 22 days, and 14,900 psi at 29 days.

One third of the specimens were immediately cooled to 62 F. and subjected to repeated heatings to ambient temperature and cooling to 62 F., in air. This mortar had compressive strengths of 9,500 psi after ten cycles of cooling and heating (7 days age), 12,800 psi after 15 cycles (22 days age), and 13,800 psi after 20 cycles (29 days age).

One third of the specimens were immediately cooled to 62 F. and subjected to heating and cooling, in water. This mortar had compressive strengths of 8,800 psi after ten cycles of heating and cooling (7 days age), 9,700 psi after 15 cycles (22 days age), and 11,200 psi after 20 cycles (29 days age).

EXAMPLE 36

A binder was prepared consisting of:

56.90 parts portland cement

29.25 parts Class C fly ash

4.96 parts metakaolin

5.37 parts slag

1.21 parts citric acid

0.20 part Cormix 2000

0.23 part borax

1.88 parts potassium carbonate

EXAMPLE 37

A mortar was prepared employing the binder of Example 36 and other necessary materials as indicated below:

745 parts of Binder of Example 36

1200 parts sand

190 parts water

The various materials were mixed in a mortar mixer. The mortar was mixed and cast in molds at ambient temperatures (73 F.). This mortar when cured at ambient temperatures (73 F.) had compressive strengths of 3,100 psi at 2 hours, 4,300 psi at 3 hours, 4,700 psi at 4 hours, 6,500 psi at 1 day, and 12,000 psi at 7 days.

EXAMPLE 38

A binder was prepared, similar to Example 36, except that 2.15 parts of potassium carbonate were used instead of 1.88 parts of potassium carbonate.

EXAMPLE 39

A mortar was prepared, similar to Example 37, except that the binder of Example 38 was employed. This mortar was cured at ambient temperatures (73 F.). This mortar had compressive strengths of 4,000 psi at 2 hours, 4,400 psi at 3 hours, and 4,800 psi at 4 hours. With steam curing (190 F.), the compressive strength was 7,300 psi at 4 hours.

EXAMPLE 40

A binder was prepared consisting of:

57.43 parts portland cement

28.98 parts Class C fly ash

4.39 parts metakaolin

4.78 parts slag

1.20 parts citric acid

0.20 part Cormix 2000

0.22 part borax

1.20 parts potassium hydroxide

1.60 parts potassium carbonate

EXAMPLE 41

A mortar was prepared employing the binder of Example 40 and other necessary materials as indicated below:

752 parts Binder of Example 40

1200 parts sand

170 parts water

The various materials were mixed in a mortar mixer. The mortar was mixed and cast in molds at ambient temperatures (73 F.). This mortar when cured at ambient temperatures had compressive strengths of 3,300 psi at 2 hours, 4,300 psi at 3 hours, and 4,500 psi at 4 hours.

EXAMPLE 42

A binder was prepared consisting of:

58.05 parts portland cement

28.69 parts Class C fly ash

4.40 parts metakaolin

4.80 parts slag

1.17 parts citric acid

0.35 part Cormix 2000

2.54 parts potassium carbonate

EXAMPLE 43

A concrete was prepared employing the binder of Example 42 and other necessary materials as indicated below:

749.4 parts Binder of Example 42

1290 parts sand

1580 parts gravel

190 parts water

The portland cement, 96% of the fly ash, metakaolin, and slag were preblended and added as a dry component to the concrete mixer. The remaining 4% of the fly ash, the citric acid, Cormix, and potassium carbonate were preblended and added separately as a second dry component. The resulting concrete remained workable for 140 minutes. The concrete was cast in molds and cured at ambient temperatures (73 F.). The concrete had compressive strengths of 2,900 psi at 4 hours, 5,200 psi at 1 day, 9,700 psi at 7 days, and 11,400 psi at 28 days.

EXAMPLE 44

A binder was prepared consisting of:

55.97 parts portland cement

27.66 parts Class C fly ash

4.25 parts metakaolin

4.63 parts slag

2.26 parts citric acid

0.34 part Cormix 2000

4.89 parts potassium carbonate

EXAMPLE 45

A concrete was prepared employing the binder of Example 44 and other necessary materials as indicated below:

777.2 parts Binder of Example 44

1148 parts sand

1722 parts gravel

175 parts water

The portland cement, fly ash, metakaolin, and slag were preblended and added as a dry cement to the concrete mixer. The citric acid, Cormix, and potassium carbonate were added as liquid admixtures which were added at the mixer. The resulting concrete remained workable for 135 minutes. The concrete was cast in molds and cured at ambient temperatures (73 F.). The concrete had compressive strengths of 3,100 psi at 4 hours, 5,500 psi at 1 day, 10,000 psi at 7 days, and 12,000 psi at 28 days.

EXAMPLE 46

A mortar, as in Example 35, was prepared employing the binder of Example 11. The various materials were mixed without an air entraining agent in a mortar mixer. Suitable specimens were cast and subjected to 300 repeated cycles of heating and cooling, as previously defined, in water. The Durability Factor for this material was 96, according to ASTM C666-84 Method A.

EXAMPLE 47

A mortar, as in Example 46, was prepared and suitable specimens were cast and placed in a solution of sodium and magnesium sulfate, according to ASTM C1012-84. The average length change after 100 days of exposure to sulfate attack was 0.06% with no visible deterioration.

EXAMPLE 48

A binder was prepared consisting of:

61.39 parts portland cement

30.33 parts Class C fly ash

4.67 parts metakaolin

0.99 part citric acid

0.21 part Cormix 2000

2.41 parts sodium carbonate

EXAMPLE 49

A concrete was prepared employing the binder of Example 48 and other necessary materials as indicated below:

706 parts Binder of Example 48

1435 parts sand

1755 parts gravel

175 parts water

The various materials were mixed in a concrete mixer. The concrete was cast in molds and cured at ambient temperatures (73 F.). This concrete had compressive strengths of 2,400 psi at 4 hours and 5,400 psi at 1 day.

EXAMPLE 50

A mortar was prepared employing the binder of Example 48 and, other necessary materials as indicated below:

709 parts Binder of Example 48

1236 parts sand

170 parts water

The various materials were mixed in a mortar mixer. The mortar was mixed and cast in molds at ambient temperatures (73 F.). The specimens were stored in ambient air (73 F.) and this mortar had compressive strengths of 3,500 psi at 4 hours and 6,700 psi at 1 day.

In the examples above, Class C fly ash had the following analysis:

SiO2 : 37.60

Al2 O3 : 20.47

Fe2 O3 : 5.44

CaO: 21.54

MgO: 4.61

SO3 : 1.71

Na2 O: 2.78

K2 O: 0.52

TiO2 : 1.05

SrO: 0.65

Class F fly ash had the following analysis:

SiO2 : 51.31

Al2 O3 : 25.03

Fe2 O3 : 7.28

CaO: 6.93

MgO: 1.91

SO3 : 0.59

Na2 O: 0.42

K2 O: 3.15

TiO2 : 1.25

SrO: 0.16

The ground slag had the following analysis:

SiO2 : 34.48

Al2 O3 : 10.15

Fe2 O3 : 0.39

CaO: 36.44

MgO: 12.56

SO3 : 2.89

Na2 O: 0.17

K2 O: 0.31

TiO2 : 0.39

SrO: 0.04

Thus, in accordance with the present invention, a composition has been given for a blended hydraulic cement for varying uses. This cement can be used with aggregates to form a concrete or mortar with high early strength, suitable for use under various curing conditions, resulting in a hardened material that can be placed in service in a matter of a few hours with high ultimate strengths and with good durability under freeze-thaw and sulfate attack.

The invention should not be considered as limited to the specific examples shown, but only as set forth in the appended claims.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US4306912 *May 30, 1980Dec 22, 1981Flowcon OyProcess for producing a binder for slurry, mortar, and concrete
US4514228 *Jul 8, 1983Apr 30, 1985SoletancheComposition for making impermeable walls and other underground structures
US4640715 *Mar 6, 1985Feb 3, 1987Lone Star Industries, Inc.Mineral binder and compositions employing the same
US4642137 *Mar 6, 1985Feb 10, 1987Lone Star Industries, Inc.Mineral binder and compositions employing the same
CA648626A *Sep 18, 1962Malgorzata GrunerMethod of producing a cement material
JPS61155239A * Title not available
SU503831A1 * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4997484 *Jun 5, 1990Mar 5, 1991Lone Star Industries, Inc.Hydraulic cement and composition employing the same
US5084102 *Dec 22, 1989Jan 28, 1992Eerste Nederlandse Cement Industrie (Enci) N. V.Cement, method of preparing such cement and method of making products using such cement
US5266111 *Oct 13, 1992Nov 30, 1993Barbour Ronald LClass F. fly ash containing settable composition for general purpose concrete having high early strength and method of making same
US5273579 *Apr 28, 1993Dec 28, 1993Mitsubishi Mining And Cement Co., Ltd.Quick setting compositions
US5349118 *Jul 13, 1993Sep 20, 1994Joseph DavidovitsMethod for obtaining a geopolymeric binder allowing to stabilize, solidify and consolidate toxic or waste materials
US5358751 *Aug 11, 1992Oct 25, 1994Hallgarth Construction LimitedFerrocement lining units, methods of making them and methods of lining a water course with them
US5374308 *May 27, 1993Dec 20, 1994Kirkpatrick; William D.Blended hydraulic cement for both general and special applications
US5385764Jul 21, 1993Jan 31, 1995E. Khashoggi IndustriesHydraulically settable containers and other articles for storing, dispensing, and packaging food and beverages and methods for their manufacture
US5387283 *Jun 29, 1994Feb 7, 1995Kirkpatrick; William D.Process for producing a hydraulic cement binder for both general and special applications
US5453310Feb 17, 1993Sep 26, 1995E. Khashoggi IndustriesCementitious materials for use in packaging containers and their methods of manufacture
US5484480 *Oct 19, 1993Jan 16, 1996Jtm Industries, Inc.Use of alumina clay with cement fly ash mixtures
US5505987 *Jan 20, 1995Apr 9, 1996Jennings; Hamlin M.Processes for improving the bond between hydrating cement-based materials and existing cement-based substrates
US5514430Oct 7, 1994May 7, 1996E. Khashoggi IndustriesCoated hydraulically settable containers and other articles for storing, dispensing, and packaging food and beverages
US5520730 *Oct 27, 1993May 28, 1996Barbour; Ronald L.Settable composition for general purpose concrete and method of making same
US5531824 *May 25, 1995Jul 2, 1996Burkes; J. PateMethod of increasing density and strength of highly siliceous cement-based materials
US5536310 *Oct 6, 1994Jul 16, 1996Sandoz Ltd.Cementitious compositions containing fly ash
US5539140 *May 1, 1992Jul 23, 1996Davidovits; JosephMethod for obtaining a geopolymeric binder allowing to stabilize, solidify and consolidate toxic or waste materials
US5543186Aug 10, 1993Aug 6, 1996E. Khashoggi IndustriesSealable liquid-tight, thin-walled containers made from hydraulically settable materials
US5545450Mar 25, 1994Aug 13, 1996E. Khashoggi IndustriesMolded articles having an inorganically filled organic polymer matrix
US5556458 *Oct 6, 1994Sep 17, 1996Sandoz Ltd.Cementitious compositions
US5580409Dec 7, 1993Dec 3, 1996E. Khashoggi IndustriesMethods for manufacturing articles of manufacture from hydraulically settable sheets
US5580624Mar 17, 1995Dec 3, 1996E. Khashoggi IndustriesFood and beverage containers made from inorganic aggregates and polysaccharide, protein, or synthetic organic binders, and the methods of manufacturing such containers
US5582670Nov 19, 1993Dec 10, 1996E. Khashoggi IndustriesMethods for the manufacture of sheets having a highly inorganically filled organic polymer matrix
US5614307Jun 7, 1995Mar 25, 1997E. Khashoggi IndustriesSheets made from moldable hydraulically settable compositions
US5626665 *Nov 4, 1994May 6, 1997Ash Grove Cement CompanyCementitious systems and novel methods of making the same
US5626954Aug 3, 1993May 6, 1997E. Khashoggi IndustriesSheets made from moldable hydraulically settable materials
US5631052Jun 7, 1995May 20, 1997E. Khashoggi IndustriesCoated cementitious packaging containers
US5631053Jun 7, 1995May 20, 1997E. Khashoggi IndustriesHinged articles having an inorganically filled matrix
US5631097Apr 24, 1995May 20, 1997E. Khashoggi IndustriesLaminate insulation barriers having a cementitious structural matrix and methods for their manufacture
US5641584Mar 28, 1995Jun 24, 1997E. Khashoggi IndustriesHighly insulative cementitious matrices and methods for their manufacture
US5654048Jun 7, 1995Aug 5, 1997E. Khashoggi IndustriesCementitious packaging containers
US5658603Jun 7, 1995Aug 19, 1997E. Khashoggi IndustriesSystems for molding articles having an inorganically filled organic polymer matrix
US5660903Jun 7, 1995Aug 26, 1997E. Khashoggi IndustriesSheets having a highly inorganically filled organic polymer matrix
US5660904Jun 7, 1995Aug 26, 1997E. Khashoggi IndustriesSheets having a highly inorganically filled organic polymer matrix
US5665439Dec 7, 1993Sep 9, 1997E. Khashoggi IndustriesArticles of manufacture fashioned from hydraulically settable sheets
US5665442Jun 7, 1995Sep 9, 1997E. Khashoggi IndustriesLaminated sheets having a highly inorganically filled organic polymer matrix
US5676905Aug 10, 1993Oct 14, 1997E. Khashoggi IndustriesMethods for manufacturing articles of manufacture from hydraulically settable mixtures
US5679381Apr 7, 1995Oct 21, 1997E. Khashoggi IndustriesSystems for manufacturing sheets from hydraulically settable compositions
US5691014Jun 7, 1995Nov 25, 1997E. Khashoggi IndustriesCoated articles having an inorganically filled organic polymer matrix
US5695811 *Jun 7, 1994Dec 9, 1997E. Khashoggi IndustriesMethods and compositions for bonding a cement-based overlay on a cement-based substrate
US5705237Jun 6, 1995Jan 6, 1998E. Khashoggi IndustriesHydraulically settable containers and other articles for storing, dispensing, and packaging food or beverages
US5705238Jun 7, 1995Jan 6, 1998E. Khashoggi IndustriesArticles of manufacture fashioned from sheets having a highly inorganically filled organic polymer matrix
US5705239Jun 7, 1995Jan 6, 1998E. Khashoggi IndustriesMolded articles having an inorganically filled organic polymer matrix
US5705242Jun 7, 1995Jan 6, 1998E. Khashoggi IndustriesCoated food beverage containers made from inorganic aggregates and polysaccharide, protein, or synthetic organic binders
US5707474Jun 7, 1995Jan 13, 1998E. Khashoggi, IndustriesMethods for manufacturing hinges having a highly inorganically filled matrix
US5709913Jun 7, 1995Jan 20, 1998E. Khashoggi IndustriesMethod and apparatus for manufacturing articles of manufacture from sheets having a highly inorganically filled organic polymer matrix
US5714002 *Feb 12, 1997Feb 3, 1998Mineral Resource Technologies, LlcProcess for making a blended hydraulic cement
US5714003 *Feb 12, 1997Feb 3, 1998Mineral Resource Technologies, LlcBlended hydraulic cement
US5714217Jun 7, 1995Feb 3, 1998E. Khashoggi IndustriesSealable liquid-tight containers comprised of coated hydraulically settable materials
US5720913Jun 7, 1995Feb 24, 1998E. Khashoggi IndustriesMethods for manufacturing sheets from hydraulically settable compositions
US5738921Apr 9, 1996Apr 14, 1998E. Khashoggi Industries, LlcCompositions and methods for manufacturing sealable, liquid-tight containers comprising an inorganically filled matrix
US5753308Jun 7, 1995May 19, 1998E. Khashoggi Industries, LlcMethods for manufacturing food and beverage containers from inorganic aggregates and polysaccharide, protein, or synthetic organic binders
US5766525Aug 10, 1993Jun 16, 1998E. Khashoggi IndustriesMethods for manufacturing articles from sheets of unhardened hydraulically settable compositions
US5788762 *Jan 27, 1997Aug 4, 1998Ash Grove Cement CompanyCementitious systems and methods of making the same
US5792251 *Feb 14, 1997Aug 11, 1998North American Refractories Co.Method of producing metakaolin
US5792252 *Oct 30, 1997Aug 11, 1998Mbt Holding AgCement compositions and admixtures thereof
US5800647Nov 24, 1993Sep 1, 1998E. Khashoggi Industries, LlcMethods for manufacturing articles from sheets having a highly inorganically filled organic polymer matrix
US5800756Jun 7, 1995Sep 1, 1998E. Khashoggi Industries, LlcMethods for manufacturing containers and other articles from hydraulically settable mixtures
US5830305Mar 25, 1994Nov 3, 1998E. Khashoggi Industries, LlcMethods of molding articles having an inorganically filled organic polymer matrix
US5830548Apr 9, 1996Nov 3, 1998E. Khashoggi Industries, LlcArticles of manufacture and methods for manufacturing laminate structures including inorganically filled sheets
US5851634Feb 7, 1994Dec 22, 1998E. Khashoggi IndustriesHinges for highly inorganically filled composite materials
US5879722Jun 7, 1995Mar 9, 1999E. Khashogi IndustriesSystem for manufacturing sheets from hydraulically settable compositions
US5928741Jun 7, 1995Jul 27, 1999E. Khashoggi Industries, LlcLaminated articles of manufacture fashioned from sheets having a highly inorganically filled organic polymer matrix
US5976240 *Sep 8, 1997Nov 2, 1999North American Refractories Co.Refractory system including reactive metakaolin additive
US5997632 *Jan 30, 1998Dec 7, 1999Mineral Resources Technologies, LlcBlended hydraulic cement
US6008275 *May 14, 1998Dec 28, 1999Mbt Holding AgCementitious mixture containing high pozzolan cement replacement and compatabilizing admixtures therefor
US6027561 *Apr 12, 1999Feb 22, 2000Engelhard CorporationCement-based compositions
US6221148Nov 30, 1999Apr 24, 2001Engelhard CorporationManufacture of improved metakaolin by grinding and use in cement-based composites and alkali-activated systems
US6251178Jan 28, 2000Jun 26, 2001Mineral Resource Technologies, LlcFly ash composition
US6416574Nov 27, 2000Jul 9, 2002Southern Ionica IncorporatedMethod and apparatus for recycling cement kiln dust
US6482258 *Jun 25, 2001Nov 19, 2002Mineral Resource Technologies, LlcFly ash composition for use in concrete mix
US6521039Feb 16, 2001Feb 18, 2003Willie W. StroupCupola slag cement mixture and methods of making and using the same
US6627138Nov 1, 2002Sep 30, 2003Willie W. StroupCupola slag cement mixture and methods of making and using the same
US6656264Oct 22, 2001Dec 2, 2003Ronald Lee BarbourSettable composition containing potassium chloride
US6740155Aug 26, 2002May 25, 2004Isg Resources, Inc.Method of delaying the set time of cement and the compositions produced therefrom
US6827776Aug 26, 2002Dec 7, 2004Isg Resources, Inc.Method for accelerating setting of cement and the compositions produced therefrom
US6939401Mar 26, 2003Sep 6, 2005Ronald Lee BarbourSettable composition containing potassium chloride
US7288148Feb 11, 2005Oct 30, 2007Cemex, Inc.Rapid hardening hydraulic cement from subbituminous fly ash and products thereof
US7341105Jun 20, 2006Mar 11, 2008Holcim (Us) Inc.Cementitious compositions for oil well cementing applications
US7393525Feb 21, 2003Jul 1, 2008University Of Maryland, BaltimoreMethod for introducing and expressing genes in animal cells, and live invasive bacterial vectors for use in the same
US7527688Dec 19, 2007May 5, 2009Holcim (Us) Inc.Cementitious compositions for oil well cementing applications
US7655202Feb 2, 2010Ceramatec, Inc.Coal fired flue gas treatment and process
US7699928Jul 11, 2007Apr 20, 2010Grancrete, Inc.Sprayable and pumpable phosphate cement
US7713615Apr 3, 2002May 11, 2010James Hardie International Finance B.V.Reinforced fiber cement article and methods of making and installing the same
US7799128Sep 21, 2010Roman Cement, LlcHigh early strength pozzolan cement blends
US7854803Jan 11, 2006Dec 21, 2010Kirkpatrick William DComposition of materials and processes of making boroncitrates to establish set times for hydraulic cements
US7892351Jul 16, 2009Feb 22, 2011Kirkpatrick William DComposition of materials and processes for making boroncitrates to create cements with field adjustable set times
US7972432Aug 2, 2010Jul 5, 2011Roman Cement, LlcHigh early strength pozzolan cement blends
US7993570Oct 7, 2003Aug 9, 2011James Hardie Technology LimitedDurable medium-density fibre cement composite
US7998571Aug 16, 2011James Hardie Technology LimitedComposite cement article incorporating a powder coating and methods of making same
US8038789Sep 3, 2009Oct 18, 2011Ceramatec, Inc.Pervious concrete comprising a geopolymerized pozzolanic ash binder
US8172940Jul 12, 2007May 8, 2012Ceramatec, Inc.Treatment of fly ash for use in concrete
US8177906May 15, 2012Ceramatec, Inc.Treatment of fly ash for use in concrete
US8261827 *Apr 16, 2012Sep 11, 2012Halliburton Energy Services Inc.Methods and compositions comprising kiln dust and metakaolin
US8273172Sep 25, 2012Grancrete, Inc.Heat resistant phosphate cement
US8281535Mar 8, 2007Oct 9, 2012James Hardie Technology LimitedPackaging prefinished fiber cement articles
US8297018Jul 16, 2003Oct 30, 2012James Hardie Technology LimitedPackaging prefinished fiber cement products
US8323399Jul 1, 2011Dec 4, 2012Roman Cement, LlcHigh early strength pozzolan cement blends
US8349071Jan 8, 2013Ceramatec, Inc.Treatment of fly ash for use in concrete
US8357239Jan 22, 2013Ceramatec, Inc.Treatment of fly ash for use in concrete
US8377201Feb 19, 2013Roman Cement, LlcNarrow PSD hydraulic cement, cement-SCM blends, and methods for making same
US8409346Apr 2, 2013Grancrete, Inc.Waste storage vessels and compositions therefor
US8409380Jul 28, 2009Apr 2, 2013James Hardie Technology LimitedReinforced fiber cement article and methods of making and installing the same
US8409711Sep 14, 2012Apr 2, 2013Grancrete, Inc.Heat resistant phosphate cement
US8414700Apr 9, 2013Roman Cement, LlcNarrow PSD hydraulic cement, cement-SCM blends, and methods for making same
US8551245Mar 13, 2013Oct 8, 2013Roman Cement LlcNarrow PSD hydraulic cement, cement-SCM blends, and methods for making same
US8562736Sep 22, 2012Oct 22, 2013Iqbal GillChemical admixtures for hydraulic cements
US8603238Mar 23, 2010Dec 10, 2013LafargeConcrete with a low clinker content
US8795428 *Oct 5, 2012Aug 5, 2014Boral Ip Holdings (Australia) Pty LimitedAerated inorganic polymer compositions and methods of making same
US8864901Nov 30, 2011Oct 21, 2014Boral Ip Holdings (Australia) Pty LimitedCalcium sulfoaluminate cement-containing inorganic polymer compositions and methods of making same
US8974593Oct 17, 2012Mar 10, 2015Roman Cement, LlcParticle packed cement-SCM blends
US8993462Apr 12, 2007Mar 31, 2015James Hardie Technology LimitedSurface sealed reinforced building element
US9212092Apr 9, 2010Dec 15, 2015Aalborg Portland A/SPortland limestone calcined clay cement
US9238591Jan 22, 2015Jan 19, 2016Roman Cement, LlcParticle packed cement-SCM blends
US9272953Jun 16, 2014Mar 1, 2016Roman Cement, LlcHigh early strength cement-SCM blends
US9321681Mar 15, 2013Apr 26, 2016United States Gypsum CompanyDimensionally stable geopolymer compositions and method
US20030153527 *Feb 21, 2003Aug 14, 2003University Of MarylandMethod for introducing and expressing genes in animal cells, and live invasive bacterial vectors for use in the same
US20030177953 *Mar 26, 2003Sep 25, 2003Barbour Ronald LeeSettable composition containing potassium chloride
US20030233962 *Jun 21, 2002Dec 25, 2003Dongell Jonathan E.Pozzolan modified portland cement compositions and admixtures therefor
US20040231569 *Jul 22, 2003Nov 25, 2004Stroup Willie W.Cupola slag cement mixture and methods of making and using the same
US20050241537 *Feb 11, 2005Nov 3, 2005Cemex Inc.Rapid hardening hydraulic cement from subbituminous fly ash and products thereof
US20070196611 *Mar 8, 2007Aug 23, 2007Yongjun ChenPackaging prefinished fiber cement articles
US20080092780 *Dec 19, 2007Apr 24, 2008Bingamon Arlen ECementitious compositions for oil well cementing applications
US20080275149 *Apr 28, 2008Nov 6, 2008Nova Chemicals Inc.Durable concrete compositions
US20080310247 *Jun 12, 2007Dec 18, 2008Richard BasarabaConcrete manufacturing facility and method of operation thereof
US20090013907 *Jul 12, 2007Jan 15, 2009Chett BoxleyTreatment of Fly Ash For Use in Concrete
US20090071379 *Nov 21, 2008Mar 19, 2009Chett BoxleyTreatment of fly ash for use in concrete
US20090090277 *Oct 9, 2007Apr 9, 2009Joshi Ashok VCoal Fired Flue Gas Treatment and Process
US20100058957 *Mar 11, 2010Chett BoxleyPrevious concrete comprising a geopolymerized pozzolanic ash binder
US20100083877 *Apr 8, 2010Selph Jeffrey LHeat resistant phosphate cement
US20100089292 *Oct 2, 2009Apr 15, 2010Grancrete, Inc.Waste storage vessels and compositions therefor
US20100089293 *Oct 8, 2009Apr 15, 2010Roman Cement, LlcHigh early strength pozzolan cement blends
US20100090168 *Oct 2, 2009Apr 15, 2010Grancrete, Inc.Radiation shielding structure composition
US20100273902 *Oct 28, 2010Nova Chemicals Inc.Durable concrete compositions
US20120193097 *Apr 16, 2012Aug 2, 2012Halliburton Energy Services, Inc.Methods and Compositions Comprising Kiln Dust and Metakaolin
CN102459113A *Apr 9, 2010May 16, 2012奥尔堡波特兰有限公司Portland limestone calcined clay cement
CN102459113B *Apr 9, 2010Jan 20, 2016奥尔堡波特兰有限公司波特兰石灰石经煅烧的粘土水泥
EP0724548A1 *Oct 17, 1994Aug 7, 1996Jtm Industries, Inc.Use of alumina clay with cement fly ash mixtures
EP0858978A2 *Feb 11, 1998Aug 19, 1998Mineral Resource Technologies, LLCBlended hydraulic cement
WO2000061515A1 *Feb 22, 2000Oct 19, 2000Engelhard CorporationImproved cement-based compositions
WO2000069787A2 *May 11, 2000Nov 23, 2000Milan KekanovicFine grounded ceramic as puzzuolanic additive in production of cement and concrete
WO2000069787A3 *May 11, 2000Apr 12, 2001Kekanovic MilanFine grounded ceramic as puzzuolanic additive in production of cement and concrete
WO2001040135A2Nov 21, 2000Jun 7, 2001Engelhard CorporationManufacture of reactive metakaolin by grinding and use in cement-based composites and alkali-activated systems
WO2003000615A1 *Jun 24, 2002Jan 3, 2003Mineral Resource Technologies, Inc.Fly ash composition for use in concrete mix
WO2008137407A1 *Apr 29, 2008Nov 13, 2008Nova Chemicals Inc.Durable concrete compositions
WO2014070231A1 *Mar 14, 2013May 8, 2014Brien Joshua VCementitious material for cold weather applications
Classifications
U.S. Classification106/706, 106/709, 106/DIG.1, 106/707
International ClassificationC04B7/153, C04B18/08, C04B7/13, C04B24/06, C04B7/21, C04B7/00, C04B14/10, C04B28/04, C04B28/02, C04B18/14, C04B, C04B22/10, C04B7/19
Cooperative ClassificationY02W30/92, Y02W30/94, Y10S106/01, C04B24/26, C04B2111/76, C04B28/04
European ClassificationC04B24/26, C04B28/04
Legal Events
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